Operating system

S9 last update was android 10 and Some applications need newer android for security reasons at least android 11

Sorry but You cannot fix this you have to buy newer device since there are no official update android 11 or higher for s9

Try to Software update via Smart Switch

Step 1. Connect your device to your computer using the USB cable provided with your device, and then open Smart Switch on your computer.

Step 2. If a software update is available, Smart Switch might automatically prompt you to update the software or will display an option to update.

Step 3. Click Update and use the on-screen prompts to download the necessary files.

Step 4. Click OK to proceed. Your device may turn off and on a few times during the update process. When the update is complete, the device returns to the Home screen.

You’re going to need a copy of Smart Switch installed on your computer and your mobile device. Using Smart Switch’s computer version, update your device with the latest software.

For more details about how to update software using Smart Switch visit our website :
https://www.samsung.com/ae/support/mobile-devices/how-to-update-software-using-smart-switch/